[PATCH v2] Avoid crash when calling warning too early

[Tom Tromey]

>>>>> "Sergio" == Sergio Durigan Junior <sergiodj@redhat.com> writes:

>> If you want, I can just drop this and you can take over.

Sergio> Thanks, but I'd prefer if you checked your patch in.  The bug reported
Sergio> on 23555 is actually composed of two issues: (a) what to do when GDB
Sergio> can't determine the CWD, and (b) the segmentation fault that happens
Sergio> when we try to call warning too early in the code.  Your patch fixes
Sergio> (b), and I still didn't sit down to figure out how to approach (a).  So
Sergio> it's best if we just go ahead and avoid the segfault for now.

I'm going to check it in now, with the ChangeLog change you suggested.

Tom